Custom window title crashes feh on unloadable files

[quezak]

With default window title feh just omits unloadable files as I go through the slideshow, but when I use image-only format specifiers ( -^ %h/w/s/p) in window title, feh produces segmentation fault when moving to any unloadable file.
I guess it just should check if file is loadable before updating window title, not only before drawing the image.
(using Gentoo on amd64, checked latest stable and dev version in Portage - 1.9 and 1.11.2 - with same result)

[derf]

Fix segfault upon unloadable image with --title %h/%w/... (closed by fc9b1de)

[derf]

A bugfix release will follow in a few days